def rc_decode():
  zhengshu=int(input("请输入一个小于100的整数:"))
  RC=[i for i in input("请输入RC地址用空格分开:").split()]
  a=b=r=c=zhi=res=""
  K=0
  for i in RC:
      zhi=i
      for j in range(0,len(zhi),1):
          if zhi[j]=="C":
              for K in range(j,len(zhi),1):
                b=b+zhi[K]
              break
          else:
              a=a+zhi[j]
      r=int(a[1:])
      c=int(b[1:])
      while c>=26:
          res=chr((c-1)%26+65)+res
          c=c//26
      res=chr((c-1)%26+65)+res+str(r)
      print(res)
      j=k=r=c=0
      a=b=res=""
      return res
